CN109364734A - A method of reducing waste acid yield during non-ferrous metal metallurgy fume treatment - Google Patents
A method of reducing waste acid yield during non-ferrous metal metallurgy fume treatment Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/82—Solid phase processes with stationary reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/508—Sulfur oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/025—Other waste gases from metallurgy plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention discloses a kind of methods of waste acid yield during reduction non-ferrous metal metallurgy fume treatment, this method is passed through Flue Gas of Nonferrous Smelting in reduction tower, with the sulphur carbon composite particles haptoreaction filled inside reduction tower, so that sulfur trioxide is reduced to sulfur dioxide in Flue Gas of Nonferrous Smelting, this method is adapted to the removing of sulfur trioxide in high-temperature flue gas, and reduction efficiency is high, high-temperature flue gas sweetening process can not be adapted to by solving in sulphur fixed bed reduction process, it easily melts and hardened, the problem of causing fixed bed to block, and solid sulfur and smoke contacts area it is small, the defects such as desulfuration efficiency is low at low temperature.
Description
Technical field
The present invention relates to a kind of processing methods of non-ferrous metal metallurgy flue gas, in particular to a kind of to utilize sulphur carbon composite particles
Sulfur trioxide in Flue Gas of Nonferrous Smelting is reduced to sulfur dioxide as reducing agent, the method to reduce waste acid generation, belonging to has
Non-ferrous metal flue gas during smelting processing technology field.
Background technique
Waste acid be nonferrous smelting roasting, fusion process output sulphur dioxide flue gas acid preparing system output by-product,
Main component is sulfuric acid (50-200g/L), fluorine (500-2000mg/L), chlorine (1000-4000mg/L), arsenic (100-1500mg/L)
And a small amount of valuable metal.Due to waste acid complicated component, impurity content is high, valuable content is low, thus recovery value is not
It is high, it is difficult to it is utilized, it is current mainly to be handled using lime neutralisation.Although lime neutralisation solves the difficulty that waste acid is had nowhere to go
Topic, but a large amount of waste water and waste residue are produced at the same time, in N-process, the generation of especially high miscellaneous gypsum tailings needs
Specific stockpiling management, so that huge cost and environmental protection pressure are born by enterprise.
For waste acid processing, researcher has been carried out systematic research, has also been had made some progress.Due in waste acid most
Valuable part is sulfuric acid, thus researcher proposes acid recovery process with their own characteristics for waste acid, such as utilizes fluorination
Hydrogen, hydrogen chloride are easy to the characteristic volatilized, and using evaporating and concentrating process, not only remove fluorine, chlorine impurity, also can get high concentration sulphur
Acid.Other than being concentrated by evaporation, some scholars propose the treatment process such as reverse osmosis membrane, electrodialysis.Although these techniques can remove portion
Divide impurity, but gained sulfuric acid purity is still lower, and processing cost is higher, it is difficult to by industrial application.Some scholars' proposition, directly
It connects and waste acid is returned into production system use, then carry out impurity removal using cleaning procedure in production system, this technique is more
Simply, but lead to purification system throwing-on, so that the controllability of production system reduces, and the introducing of big volume low-concentration waste acid,
It easily leads to production system and acid plumping and water swellable problem occurs.Therefore, it is still left to be desired for the comprehensive utilizating research of waste acid.
In addition, researcher carries out the work mainly for the comprehensive utilization of waste acid, rarely has the thinking for the yield for considering how to reduce waste acid.
Zeng You researcher proposes the oxygen gesture of control roasting and fusion process, to avoid the peroxidization (2SO of sulphur2+O2=2SO3),
Although this method can reduce the concentration of sulfur trioxide in flue gas, oxygen potential drop is low to cause roasting and melting reaction progress not thorough
Bottom and make sulfur dioxide in flue gas concentration reduction, be unfavorable for relieving haperacidity.
In the prior art, " method for the middle sulfur trioxide that removes smoke " that number of patent application is 201711276876.9, mentions
It has supplied a kind of to spray into H into flue gas2S is come the technology for the middle sulfur trioxide that removes smoke.Although H2S can remove smoke in oxygen
And sulfur trioxide, but H2The reduction selectivity of S is not high, not only can be with SO3Reaction, can also preferentially with oxygen and SO2Reaction causes
Make H2S consumption is big, and processing cost is high.Further, since H2S belongs to gas that is inflammable and explosive and having severe toxicity, this makes using this
One technology faces biggish safety and environmental risk.
Number of patent application is 201310646912.1 " method of sulfur trioxide and sulfur cream sulfur dioxide liquid and to set
It is standby ", describe a kind of method using sulfur trioxide in blocks of solid sulphur removing mixed gas.As mentioned by this method
Mixed gas temperature is lower, and reactor has cooling device, to can guarantee that sulfur in lump form is not hardened and melts, however smelts cigarette
Temperature degree is higher (typically larger than 150 DEG C), and dustiness is higher, and exhaust gas volumn is larger (usual 2~6 ten thousand steres/h), Wu Fajin
Row cooling, under these conditions, solid sulfur will be melted, to block gas circuit, lead to production accident.Certainly, more crucial
, sulfur trioxide concentration is lower in flue gas during smelting, it is generally only 0.2~0.6%, and (Massive Sulphur is influenced by reaction interface
Sulphur), the effect that this method restores sulfur trioxide is limited, it is difficult to obtain good effect.
Based on existing method, there are the reasons of many deficiencies, either by the method for control oxygen gesture, or with hydrogen sulfide
For the reduction method of representative, it is not smelted factory and is used, thus, industry needs the effective ways of exploitation and control waste acid.
Summary of the invention
For in the prior art, in Flue Gas of Nonferrous Smelting sulfur trioxide subtractive process, using sulphur fixed bed reduction process
In can not adapt to high-temperature flue gas sweetening process, sulphur easily melts and hardened, the problem of causing fixed bed to block and solid sulfur
Small with smoke contacts area, the defects such as desulfuration efficiency is low at low temperature utilize sulphur carbon the purpose of the invention is to provide a kind of
Method of the composite particles as sulfur trioxide in reducing agent reduction Flue Gas of Nonferrous Smelting, is adapted to sulfur trioxide in high-temperature flue gas
Removing, and reduction efficiency is high, is conducive to industrialized production.
In order to achieve the above technical purposes, the present invention provides dirty during a kind of reduction non-ferrous metal metallurgy fume treatment
The method of acid yield, this method are passed through Flue Gas of Nonferrous Smelting in reduction tower, compound, sulphur carbon with filling inside reduction tower
Grain haptoreaction, so that sulfur trioxide is reduced to sulfur dioxide in Flue Gas of Nonferrous Smelting.
Preferred scheme, the sulphur carbon composite particles are supported in porous carbon particle by sulphur and are constituted.
Sulphur carbon composite particles preparation process of the invention: sulphur and active carbon are weighed according to formula, by it in batch mixer
After premix is uniform, then the material mixed is added in kneader, controlled at 85 DEG C, revolving speed 1200rpm is pinched at a high speed
Close 15min；Finally, being pelletized using discharge at a slow speed, Control granularity is in+100 mesh~-20 mesh.
More preferably scheme, in the sulphur carbon composite particles porous carbon particle and the mass percentage composition of sulphur be 20~
70%:30~80%.
More preferably scheme ,+100 mesh of granularity~-20 mesh of the sulphur carbon composite particles.
The sulfur trioxide concentration of preferred scheme, the Flue Gas of Nonferrous Smelting is greater than 0.05%.
More preferably scheme, the Flue Gas of Nonferrous Smelting are the roasting of nonferrous metal sulfide mineral, caused by fusion process
Sulfur dioxide flue gas (such as roasting of copper, lead, zinc, tin, antimony, cobalt, nickel, gold nonferrous metal sulfide mineral) and/or pyritic material
Sulfur dioxide flue gas caused by acid manufacturing processes.
Preferred scheme, the temperature of the flue gas during smelting is at 95~400 DEG C.
Preferred scheme, residence time of the flue gas during smelting in reduction tower are no less than 55s.
The present invention selects sulphur carbon composite particles as the reducing agent of sulfur trioxide in non-ferrous metal metallurgy flue gas, will be in flue gas
Sulfur trioxide from source remove, prevent the generation of waste acid.Since waste acid is that sulfur trioxide in flue gas is dissolved in water and is formed, rather than
The dissolution of sulfur dioxide, thus the generation of waste acid is thoroughly solved, key is how to reduce or eliminate three oxidations in flue gas
Sulfur content.In view of sulfur trioxide is the product of sulfide peroxidating, present invention proposition uses sulphur for reducing agent, and sulphur is opposite
Hydrogen sulfide sulfides reducing agent, selectivity it is good, the property of can choose restore sulfur trioxide, and avoid sulfur dioxide from being reduced and
Reduce sulphuric acid output.However, sulphur fusing point is lower (114 DEG C), and non-ferrous metal metallurgy flue-gas temperature is typically larger than 200 DEG C, this
So that drusen melts after encountering flue gas, reaction interface is caused to reduce, or even cause gas circuit obstructing problem, while single sulphur
Sulphur particle is typically more fine and close, and the sulfur trioxide concentration in flue gas is lower, this makes using drusen as reducing agent
Reduction reaction efficiency is lower.Technical solution of the present invention is put forward for the first time using sulphur carbon composite particles as reducing agent, by porous carbon
Support body material of the material as sulphur, though mechanical strength still with higher at high temperature, and sulphur melts under high temperature
Afterwards, it is still attracted in the duct of porous carbon, effectively prevents the problem of sulphur melts knot tying, leads to airway blockage, simultaneously
Porous carbon particle provides bigger reaction interface for sulphur, is conducive to the haptoreaction area for improving sulphur and flue gas, improves reaction
Efficiency.In addition, porous carbon itself belongs to mesoporous material, the progress of redox reaction is peomoted, three oxidations are enhanced
The reduction reaction of sulphur.
Technical solution of the present invention by before existing sulfur dioxide flue gas washing system, using sulphur carbon composite particles as
Reducing agent increases prereduction process and exists so that the sulfur trioxide in flue gas is reduced to sulfur dioxide to significantly reduce flue gas
Pohle steps on waste acid amount when washing, and improves sulfuric acid yield.
Reduction tower schematic diagram of the invention is as shown in the figure.Restoring tower is that common fixed-bed type restores tower, with compound, sulphur carbon
Grain is used as fixed bed packing material.Multilayer can be set in fixed bed, is equipped with 7 layers of sulphur carbon composite particles filled layer as shown in figure 1, each
Layer is equipped with spare exhaust outlet and material import and export, and material import and export is mainly used for the charging of sulphur carbon composite particles and compound, sulphur carbon
The discharge for the slag charge that grain reaction failure is formed.The top of the gas access setting of tower is restored, gas vent is arranged in bottom.
Compared with prior art, technical solution of the present invention has the advantage that
1) present invention process is simple, is not necessarily to special device, at low cost, is easy to industrial applications.
2) for the present invention using sulphur carbon composite particles as reducing agent, sulphur is active material, and sulphur is conventional chemical medicine
Agent, and use process will not introduce new impurity.
3) sulphur carbon composite particles of the invention are easily obtained, and use cost is low, and using sulphur carbon composite particles with respect to sulphur
Particle overcomes the technical issues of drusen is difficult to adapt to high-temperature flue gas removing sulfur trioxide and sulphur as reducing agent
The problems such as grain reduction efficiency is low.
4) sulfur trioxide reduction rate of the present invention is high, can not only reduce waste acid output, after reduction treatment, sulfur dioxide flue gas
The content of middle sulfur trioxide can be down to 0.05% hereinafter, waste acid yield is down to 30% or less；Sulphuric acid output also can be improved, have compared with
Good economic value.
5) technical solution of the present invention is environmentally friendly, and no exhaust gas, waste water, waste residue generate.
Detailed description of the invention
Fig. 1 is that non-ferrous metal metallurgy flue gas restores tower structure schematic diagram.
Specific embodiment
Following embodiment is intended to further illustrate the content of present invention, rather than limits the model of the claims in the present invention protection
It encloses.
Embodiment 1:
With containing elemental sulfur, for 55%, active carbon 45%, partial size is that the sulphur carbon composite particles of 40-60 mesh are reducing agent, by it
It is fitted into reduction reaction tower.Then by sulfur dioxide flue gas (CSO2=8.55-8.76%, CSO3=0.42-0.47%, dustiness
For 106mg/m3) be introduced into reduction reaction tower, control flue-gas temperature is 145-150 DEG C, and flue gas flow is 2.3 ten thousand m3/ h so that
Flue gas is 85s in dwell time in the tower, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restore tower outlet temperature
It is 134-136 DEG C, sulfur trioxide concentration 0.036-0.038% in flue gas, reduction rate is up to 92.15%, while sulfur dioxide is dense
Degree is improved to 8.86-8.94%, and the quantum of output of waste acid is by 18.2m before3/ h is reduced to 2.4m3/ h, waste acid reduction are bright
It is aobvious.
Comparative example 1:
With containing elemental sulfur, for 98%, partial size is that the drusen of 40-60 mesh is reducing agent, is loaded into reduction reaction tower
In.Then by sulfur dioxide flue gas (CSO2=8.55-8.76%, CSO3=0.42-0.47%, dustiness 106mg/m3) introduce
Into reduction reaction tower, control flue-gas temperature is 145-150 DEG C, and flue gas flow is 2.3 ten thousand m3/ h so that flue gas stops in tower
Time is 85s, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restoring tower outlet temperature is 122-133 DEG C, cigarette
Sulfur trioxide concentration is down to 0.27-0.31% in gas, and reduction rate is up to 31.48%, while sulfur dioxide concentration is improved to 8.68-
8.81%, the quantum of output of waste acid is by 18.2m before3/ h is reduced to 14.2m3/ h, waste acid yield have certain reduction.
Comparative example 1 the difference from embodiment 1 is that: in embodiment 1 using sulphur carbon composite particles as reducing agent, and right
Pure drusen is then used in ratio 1, the two differs greatly to the reduction effect of sulfur trioxide in flue gas, this is because single
Drusen cohesion is melted in high-temperature flue gas so that the reaction interface of sulphur and sulfur trioxide strongly reduces, cause to three
The reduction efficiency of sulfur oxide reduces, and sulphur carbon composite particles are still able to maintain original form in high-temperature flue gas, so as to true
Protect the reduction efficiency to sulfur trioxide.In addition, the high absorption property of active carbon also can promote the progress of reduction reaction.
Embodiment 2:
With containing elemental sulfur, for 55%, active carbon 45%, partial size is that the sulphur carbon composite particles of 60-80 mesh are reducing agent, by it
It is fitted into reduction reaction tower.Then by sulfur dioxide flue gas (CSO2=11.48-12.15%, CSO3=0.87-0.92%, dust-laden
Amount is 72mg/m3) be introduced into reduction reaction tower, control flue-gas temperature is 158-161 DEG C, and flue gas flow is 1.9 ten thousand m3/ h, makes
It is 70s that flue gas, which is obtained, in dwell time in the tower, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restore tower outlet temperature
Degree is 152-157 DEG C, and sulfur trioxide concentration is down to 0.039-0.041% in flue gas, and reduction rate is up to 96.04%, while dioxy
Change sulphur concentration 12.14-12.32%, the quantum of output of waste acid is by 27.5m before3/ h is reduced to 3.2m3/ h, waste acid yield is less than biography
The 12% of technique of uniting, waste acid reduction is obvious.
Comparative example 2:
It, will with containing elemental sulfur, for 55%, active carbon 45%, partial size is reducing agent for the sulphur carbon composite particles greater than 180 mesh
It is fitted into reduction reaction tower.Then by sulfur dioxide flue gas (CSO2=11.48-12.15%, CSO3=0.87-0.92%, contain
Dust quantity is 72mg/m3) be introduced into reduction reaction tower, control flue-gas temperature is 158-161 DEG C, and flue gas flow is 1.9 ten thousand m3/h,
So that flue gas is 70s in dwell time in the tower, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restore tower outlet
Temperature is 152-157 DEG C, and sulfur trioxide concentration is down to 0.139-0.241% in flue gas, and reduction rate is up to 79.54%, while two
Sulfur oxide concentration 11.82-12.22%, the quantum of output of waste acid is by 27.5m before3/ h is reduced to 6.8m3/ h, waste acid yield have one
Fixed reduction.
Comparative example 2 and embodiment 2 the difference is that the granularity of sulphur carbon particle used in the two is different, sulphur carbon used in comparative example
Particle is thinner, and usual fine grained activity is higher, and reaction interface is bigger, thus reaction efficiency is higher, but there is also easy for fine grained
The problem of sintering, with the extension of reaction time, reaction interface, reduce rapidly.In addition, fine grained is easily floated with flue gas, so that filling out
Expect that the sulphur carbon composite particles amount in tower is reduced, the drop caused to sulfur trioxide reducing power is necessarily arrived in the reduction of reducing agent dosage
It is low.
Embodiment 3:
With containing elemental sulfur, for 55%, active carbon 45%, partial size is that the sulphur carbon composite particles of 40-60 mesh are reducing agent, by it
It is fitted into reduction reaction tower.Then by sulfur dioxide flue gas (CSO2=3.04-3.21%, CSO3=0.21-0.24%, dustiness
For 217mg/m3) be introduced into reduction reaction tower, control flue-gas temperature is 127-138 DEG C, and flue gas flow is 2.7 ten thousand m3/ h so that
Flue gas is 68s in dwell time in the tower, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restore tower outlet temperature
It is 116-120 DEG C, sulfur trioxide concentration is reduced to 0.011-0.013% in flue gas, and reduction rate is up to 94.11%, while dioxy
Change sulphur concentration to improve to 3.11-3.18%, the quantum of output of waste acid is by 9.2m before3/ h is reduced to 0.7m3/ h, waste acid minimizing
Effect is obvious.
Embodiment 4:
With containing elemental sulfur, for 35%, active carbon 65%, partial size is that the sulphur carbon composite particles of 70-90 mesh are reducing agent, by it
It is fitted into reduction reaction tower.Then by sulfur dioxide flue gas (CSO2=24.15-24.62%, CSO3=0.76-0.81%, dust-laden
Amount is 156mg/m3) be introduced into reduction reaction tower, control flue-gas temperature is 285-310 DEG C, and flue gas flow is 1.4 ten thousand m3/ h, makes
It is 56s that flue gas, which is obtained, in dwell time in the tower, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restore tower outlet temperature
Degree is 261-277 DEG C, and sulfur trioxide concentration is down to 0.029% by 0.76% in flue gas, and reduction rate is up to 96.81%, while two
Sulfur oxide concentration is improved by 24.15% to 24.62%, and the quantum of output of waste acid is by 35.6m before3/ h is reduced to 3.6m3/ h, it is dirty
Acid reduction effect is obvious.
Embodiment 5:
With containing elemental sulfur, for 60%, active carbon 40%, partial size is that the sulphur carbon composite particles of 60-80 mesh are reducing agent, by it
It is fitted into reduction reaction tower.Then by sulfur dioxide flue gas (CSO2=15.21-15.47%, CSO3=0.68-0.71%, dust-laden
Amount is 122mg/m3) be introduced into reduction reaction tower, control flue-gas temperature is 180-196 DEG C, and flue gas flow is 2.1 ten thousand m3/ h, makes
It is 76s that flue gas, which is obtained, in dwell time in the tower, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restore tower outlet temperature
Degree is 165-172 DEG C, and sulfur trioxide concentration is down to 0.033-0.037% in flue gas, and reduction rate is up to 95.33%, while dioxy
Change sulphur concentration to improve to 15.77-15.86%, the quantum of output of waste acid is by 28.7m before3/ h is reduced to 2.6m3/ h, waste acid decrement
It is obvious to change effect.
Embodiment 6:
With containing elemental sulfur, for 75%, active carbon 25%, partial size is that the sulphur carbon composite particles of 30-50 mesh are reducing agent, by it
It is fitted into reduction reaction tower.Then by sulfur dioxide flue gas (CSO2=20.18-20.52%, CSO3=1.25-1.32%, dust-laden
Amount is 115mg/m3) be introduced into reduction reaction tower, control flue-gas temperature is 255-263 DEG C, and flue gas flow is 2.4 ten thousand m3/ h, makes
It is 62s that flue gas, which is obtained, in dwell time in the tower, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restore tower outlet temperature
Degree is 238-241 DEG C, and sulfur trioxide concentration is down to 0.046-0.049% in flue gas, and reduction rate is up to 96.47%, while dioxy
Change sulphur concentration to improve to 21.09-21.18%, the quantum of output of waste acid is by 19.8m before3/ h is reduced to 2.2m3/ h, waste acid decrement
It is obvious to change effect.
Embodiment 7:
With containing elemental sulfur, for 78%, active carbon 22%, partial size is that the sulphur carbon composite particles of 40-60 mesh are reducing agent, by it
It is fitted into reduction reaction tower.Then by sulfur dioxide flue gas (CSO2=10.17-10.51%, CSO3=0.47-0.51%, dust-laden
Amount is 78mg/m3) be introduced into reduction reaction tower, control flue-gas temperature is 102-108 DEG C, and flue gas flow is 1.7 ten thousand m3/ h, makes
It is 105s that flue gas, which is obtained, in dwell time in the tower, it is ensured that the sulfur trioxide in flue gas is sufficiently reacted with drusen.Restore tower outlet
Temperature is 95-99 DEG C, and sulfur trioxide concentration is down to 0.017-0.021% in flue gas, and reduction rate is up to 96.41%, while dioxy
Change sulphur concentration to be improved by 10.17% to 10.46-10.52%, the quantum of output of waste acid is by 15.2m before3/ h is reduced to 0.8m3/
H, waste acid reduction are obvious.
Claims (8)
1. a kind of method of waste acid yield during reduction non-ferrous metal metallurgy fume treatment, it is characterised in that: by nonferrous smelting
Flue gas is passed through in reduction tower, the sulphur carbon composite particles haptoreaction with filling inside reduction tower, so that three in Flue Gas of Nonferrous Smelting
Sulfur oxide is reduced to sulfur dioxide.
2. the method for waste acid yield during a kind of reduction non-ferrous metal metallurgy fume treatment according to claim 1,
Be characterized in that: the sulphur carbon composite particles are supported in porous carbon particle by sulphur and are constituted.
3. the method for waste acid yield during a kind of reduction non-ferrous metal metallurgy fume treatment according to claim 2,
Be characterized in that: in the sulphur carbon composite particles porous carbon particle and the mass percentage composition of sulphur be 20~70%:30~
80%.
4. according to claim 1~described in any item a kind of reduce waste acid yield during non-ferrous metal metallurgy fume treatment
Method, it is characterised in that: the granularity of the sulphur carbon composite particles is+100 mesh~-20 mesh.
5. the method for waste acid yield during a kind of reduction non-ferrous metal metallurgy fume treatment according to claim 1,
Be characterized in that: the sulfur trioxide concentration of the Flue Gas of Nonferrous Smelting is greater than 0.05%.
6. the method for waste acid yield during a kind of reduction non-ferrous metal metallurgy fume treatment according to claim 5,
Be characterized in that: the Flue Gas of Nonferrous Smelting is the roasting of nonferrous metal sulfide mineral, sulfur dioxide flue gas caused by fusion process,
And/or sulfur dioxide flue gas caused by pyritic material acid manufacturing processes.
7. according to claim 1, described in 5 or 6 during a kind of reduction non-ferrous metal metallurgy fume treatment waste acid yield side
Method, it is characterised in that: the temperature of the flue gas during smelting is at 95~400 DEG C.
8. the method for waste acid yield during a kind of reduction non-ferrous metal metallurgy fume treatment according to claim 1,
Be characterized in that: residence time of the flue gas during smelting in reduction tower is no less than 55s.
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| CN107144144A (en) * | 2017-05-04 | 2017-09-08 | 中南大学 | A kind of method that sulfur trioxide and waste acid are produced in effective suppression flue gas during smelting |
| CN108211711A (en) * | 2017-12-06 | 2018-06-29 | 中国恩菲工程技术有限公司 | Remove smoke the method for middle sulfur trioxide |
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